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Registros recuperados: 39
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Características físico-hídricas dos solos Latossolo Amarelo, Podzólico Vermelho-Amarelo e Podzol Hidromórfico do Estado do Amazonas. Repositório Alice
CORREA, J. C..
Estudo das caracteristicas fisico-hidricas dos solos Latossolo Amarelo de textura muito argilosa, Pdozolico Vermelho-Amarelo de textura argilosa, Podzolico Vermelho-Amarelo de textura media e Podzol Hidromorfico foi realizado em Manaus, AM. A area esta situada a margem esquerda da rodovia AM-10, Km 30, que liga Manaus a cidade de Itacoatiara. As condicoes de aeracao sao: media para os tres primeiros solos, e boa, para o Pdozol Hidromorfico. As curvas caracteristicas de retencao de umidade mostraram que: a) a tendencia a horizontabilidade se deu em torno da tensao de duas atmosferas para os tres primeiros tipos de solos e de uma atmosfera para o ultimo; b) a capacidade de agua disponivel e media para os tres primeiros e baixa para o ultimo.
Tipo: Artigo de periódico Palavras-chave: Relacoes hidricas; Densidade; Water relation; Aeração; Porosidade; Aeration; Density; Porosity.
Ano: 1984 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1119150
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Caracterização físico-hídrica de latossolo amarelo da região de Capitão Poço, Pará. Infoteca-e
COSTA, M. P. da; TEIXEIRA, L. B..
bitstream/item/42255/1/Boletim-Pesquisa-133-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Densidade aparente; Capitao Poco; Pará; Brasil; Oxysol; Organic mather; Analysis.; Análise; Água; Argila; Física; Matéria Orgânica; Latossolo Amarelo; Porosidade; Solo.; Amazonia; Bulk density; Clay; Porosity; Soil physics; Water..
Ano: 1992 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/380484
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Caracterización física y micromorfología de materiales orgánicos e inorgánicos para la generación de mezclas de sustratos en la producción de lisiathus (Eustoma grandiflorum) Colegio de Postgraduados
Anicua Sánchez, Rosa.
La producción de cultivos en maceta está relacionada con la selección de sustratos, que se basa en las propiedades físicas y en particular con el tamaño y la distribución de partículas, que determinan la retención y el movimiento de agua. Por lo que, el objetivo del presente trabajo fue la caracterización de materiales orgánicos e inorgánicos a partir de las propiedades físicas y micromorfológicas para la generación de mezclas en la producción de Lisianthus. Se realizó la caracterización de sustratos orgánicos (fibra de coco, peat moss, composta y vermicomposta) e inorgánicos (tezontle, piedra pómez, perlita y zeolita); con base en las propiedades físicas como densidad aparente (DA) y densidad real (DR) (Ansorena, 1994); espacio poroso total (EPT),...
Tipo: Tesis Palavras-chave: Sustratos; Curva de retención de humedad; Porosidad; Lisianthus; Micromorfología; Growing media; Waterrelease curve; Porosity; Lisianthus; Micromorphology.
Ano: 2008 URL: http://hdl.handle.net/10521/1408
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CHANGES IN PHYSICAL PROPERTIES OF A TYPIC HAPLOCAMBID BY ANNUAL CROP CULTURE J. Soil Sci. Plant Nutr.
Seguel,O; Baginsky,C; Contreras,A; Covarrubias,J; Gonzalez,C; Sandoval,M.
As an alternative to organic soil amendments used in the Copiapo Valley (northern Chile), this study analyzed the magnitude of changes in physical soil properties associated with different crop rotations on the rows on a grape orchard. The study was performed in the locality of Los Loros, Atacama Region, during the 2006-2008 seasons. In a Typic Haplocambid soil (2-5% slope, coarse loam) with a 6-year old grape plantation, a control and three crop rotations were established, each with four replicates. Soil samples were taken at three depths (0-10; 10-40; 40-60 cm), evaluating bulk density, penetration resistance, aggregate stability, pore size distribution and air and water flux. Crop rotation did not produce statistical differences in soil density compared...
Tipo: Journal article Palavras-chave: Porosity; Aggregate stability; Mechanical strength; Productivity.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162011000100001
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Comparison of the physical and geotechnical properties of gas-hydrate-bearing sediments from offshore India and other gas-hydrate-reservoir systems ArchiMer
Winters, W. J.; Wilcox-cline, R. W.; Long, P.; Dewri, S. K.; Kumar, P.; Stern, L.; Kerr, L..
The sediment characteristics of hydrate-bearing reservoirs profoundly affect the formation, distribution, and morphology of gas hydrate. The presence and type of gas, porewater chemistry, fluid migration, and subbottom temperature may govern the hydrate formation process, but it is the host sediment that commonly dictates final hydrate habit, and whether hydrate may be economically developed. In this paper, the physical properties of hydrate-bearing regions offshore eastern India (Krishna-Godavari and Mahanadi Basins) and the Andaman Islands, determined from Expedition NGHP-01 cores, are compared to each other, well logs, and published results of other hydrate reservoirs. Properties from the hydrate-free Kerala-Konkan basin off the west coast of India are...
Tipo: Text Palavras-chave: Physical properties; Gas hydrate; Porosity; Atterberg limits; Consolidation; Permeability; Shear strength; Scanning electron microscopy.
Ano: 2014 URL: https://archimer.ifremer.fr/doc/00289/40036/38799.pdf
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Comportamento hidro-erosivo de depósitos sedimentares da Formação Macacu situados na Ilha do Governador-RJ. Repositório Alice
PORTOCARRERO, H.; CAMPOS, T. M. P. de; ANDRADE, A. G. de; BRIZZI, R. R..
A Ilha do Governador, inserida no contexto do Gráben da Guanabara, é marcada pela presença de exposições de depósitos sedimentares paleogênicos pertencentes à Formação Macacu. Tais exposições, atualmente evidentes em cortes de estrada e antigas jazidas para extração de material terroso, apresentam elevado grau de degradação causada pela erosão hídrica, o que é constatado a partir da presença de sulcos e voçorocas. O presente trabalho teve como objetivo analisar o comportamento hidro-erosivo de depósitos sedimentares da Formação Macacu expostos em uma jazida situada na área patrimonial do Aeroporto Internacional do Rio de Janeiro, buscando relacionar sedimentologia, hidráulica e erodibilidade. Após a interpretação geológica das exposições de sedimentos,...
Tipo: Artigo de periódico Palavras-chave: Erodibilidade; Sedimento; Porosidade; Permeabilidade; Solo; Hidráulica; Sediments; Permeability; Porosity; Erodibility; Soil.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1133875
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Correction of seabed layer thickness in processing subbottom profile data. OceanDocs
Wang, Fangqi; Qi, Faqing; Hu, Guanghai; Dong, Lifeng; Tao, Changfei.
The subbottom profiling is an important means of marine engineering survey, hazardous geology study and continental shelf scientific research. The accuracy of subbottom profile data interpretation has a direct impact on the research and investigation results. Because some of profilers’ transducer and hydrophone are separately installed, when the survey area is very shallow, distortion of shallow layers will be caused if it is seen as a self-excited and self-collected single-channel seismic system. According to the principle of subbottom profiler, the distortion correction formula is deduced and analyzed, providing actual value to using C-View software to interpret such subbottom profile data more accurately. In addition, the seabed sediments sound velocity...
Tipo: Journal Contribution Palavras-chave: Crustal thickness; Sound velocity; Porosity; Forecasting.
Ano: 2012 URL: http://hdl.handle.net/1834/5852
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Densidade aparente e porosidade do solo no desenvolvimento do milho. Infoteca-e
BAENA, A. R. C.; DUTRA, S..
bitstream/item/59280/1/CPATU-ComTec24.pdf
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Desenvolvimento; Densidade; Maize; Development; Growth.; Crescimento; Milho; Porosidade; Solo; Zea Mays.; Density; Porosity; Soil..
Ano: 1979 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376654
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Efeitos de diferentes sistemas de cultivo nas propriedades físicas e produtividade do solo. Infoteca-e
BAENA, A. R. C.; DUTRA, S.; KITAMURA, P. C..
bitstream/item/40430/1/Boletim-Pesquisa-67-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Propriedade física; Cultivo; Densidade; Capitão Poço; Pará; Brasil; Cultivation; Management; Physical proprierties; Yield.; Manejo; Latossolo Amarelo; Porosidade; Produtividade; Solo.; Amazonia; Density; Porosity; Soil..
Ano: 1985 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/381693
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Effect of adding flours from marolo fruit (Annona crassiflora Mart) and jerivá fruit (Syagrus romanzoffiana Cham Glassm) on the physicals and sensory characteristics of food bars Ciênc. Tecnol. Aliment.
SILVA,Edson Pablo da; SIQUEIRA,Heloisa Helena; DAMIANI,Clarissa; VILAS BOAS,Eduardo Valério de Barros.
Abstract The marolo (Annona crassiflora Mart.) and jerivá (Syagrus romanzoffiana Cham Glassm) fruits grow in the Cerrado biome, and have important sensory and nutritional characteristics. These fruits are eaten fresh or processed and embedded in ice cream, candy, juices, and liquors. However, their use is very limited and is localized exclusively to their native region. The aim of this study was to evaluate the use of these fruits in food consumer products to improve the nutritional patterns of consumers and extend knowledge thereof. To do this, different levels (0%, 5%, 10%, 15%, and 20%) of flour derived from the marolo and jerivá fruits were incorporated into food bars, which were then characterized in terms of their physical of the texture (TPA),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Flour; Savannah fruits; Porosity; Physical properties.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000100140
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Elastic stresses and plastic deformations in 'Santa Clara' tomato fruits caused by package dependent compression PAB
PEREIRA,ADRIANA VARGAS; CALBO,ADONAI GIMENEZ.
The objective of this work was to study the fruit compression behavior aiming to develop new tomato packages. Deformations caused by compression forces were observed inside packages and in individual 'Santa Clara' tomato fruit. The forces applied by a transparent acrylic lever to the fruit surface caused pericarp deformation and the flattened area was proportional to the force magnitude. The deformation was associated to the reduction in the gas volume (Vg), caused by expulsion of the air from the loculus cavity and reduction in the intercellular air volume of the pericarp. As ripening advanced, smaller fractions of the Vg reduced by the compressive force were restored after the stress was relieved. The lack of complete Vg restoration was an indication of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lycopersicon esculentum; Mechanical damage; Porosity; Storage losses.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000001200014
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Experimental and numerical characterization of an oyster farm impact on the flow ArchiMer
Gaurier, Benoit; Germain, Gregory; Kervella, Youen; Davourie, Julia; Cayocca, Florence; Lesueur, Patrick.
Shellfish farming, particularly oyster farms, suffers from strong siltation phenomena which are harmful to the production of shellfish. The lack of knowledge about the impact of an oyster farm on the wave propagation and on the flow remains a significant difficulty for the comprehension of sediment transport processes in coastal zones. These effects are one of the possible sources of sedimentation. The study presented here focuses on describing finely hydrodynamical phenomena (velocity fields, turbulence parameters) around oyster tables. The analysis is based on experimental trials carried out in a flume tank on reduced models of oyster tables. Experiments highlight the flow perturbations in the near field and constitute a database for validation of...
Tipo: Text Palavras-chave: Sediment dynamics; Oyster table; LDV measurement; Computational fluid dynamics; Porosity; Boundary layer.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00043/15421/12974.pdf
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FORRAGEIRAS TROPICAIS EM CONSÓRCIO COM MILHO E ADUBAÇÃO NITROGENADA SOBRE AS PROPRIEDADES FÍSICAS DO SOLO 196
Mattei, Eloisa; Rabello de Oliveira, Paulo Sérgio; Costa Crusciol, Carlos Alexandre; Rocha de Moraes Rego, Carlos Augusto; Piano, Jeferson Tiago; da Silveira, Lucas.
Os sistemas integrados de produção lavoura-pecuária (SIPAs) em associação ao sistema de semeadura direta, sofrem ação do pisoteio animal ou do tráfego intenso de máquinas agrícolas, podendo resultar em alterações nas propriedades físicas do solo. O objetivo deste trabalho foi avaliar o efeito da adubação nitrogenada e manejos das forrageiras tropicais nas propriedades físicas do solo. O experimento foi realizado entre outubro de 2017 e janeiro de 2020, em Marechal Cândido Rondon – PR, em blocos ao acaso, com parcelas sub-subdivididas com uma testemunha adicional e quatro repetições. As parcelas foram constituídas por duas espécies forrageiras consorciadas com o milho: Urochloa brizantha e Magathyrsus maximum, mais a testemunha adicional (milho solteiro)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Porosity; Soil physical quality; Resistance to penetration; Integrated systems; Porosidade; Qualidade física do solo; Resistência à penetração; Sistemas integrados.
Ano: 2021 URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6318
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Influence of soil cover on pore distribution and connectivity density in a Ferralssol evaluated by 3D computerized microtomography. Repositório Alice
LEMES, M. W. A.; MACHADO, A. S.; VASQUES, G. de M.; RODRIGUES, H. M.; LOPES, R. T.; ROSAS, R. O..
In the search for new techniques aimed at complementing and adding new data on Ferralsols, high resolution computer microtomography (microCT) appears as a non-destructive and fast analytical technique. MicroCT has been outstanding in the international scenarios and it is more and more present in soil analyses. Analyzing a soil sample by microCT allows obtaining knowledge, in microscale, on shape, size, distribution, volume, area and pore connectivity and having a 3D visualization of the soil sample and its structure. The objective of this work is to use microCT to compare the porosity distribution and pore connectivity density between a soil without vegetation cover and a soil with grass cover, both Ferralsols. Four undisturbed samples of each soil were...
Tipo: Artigo de periódico Palavras-chave: Técnica de microtomografia; Solo; Porosidade; Estrutura do Solo; Soil; Porosity; Soil structure.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114990
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INFLUENCE OF SUBSTRATE AND SPECIES ARRANGEMENT OF CULTIVATED GRASSES ON THE EFFICIENCY OF HORIZONTAL SUBSURFACE FLOW CONSTRUCTED WETLANDS REA
Saraiva,Claudety B.; Matos,Antonio T.; Matos,Mateus P.; Miranda,Suymara T..
ABSTRACT We aimed to evaluate the efficiency of six different horizontal subsurface flow constructed wetlands (HSSF-CWs), with different substrates (gravel and crushed PET bottles), which also varied in relation to the presence and arrangement of plant species (elephant grass and Tifton 85 bermudagrass) in the removal of pollutants from a bulk milk cooling tank (MTWW). Each bed was fed at a flow rate of 0.18 m3 d-1 and average organic load rate (OLR) of 318 kg ha-1 d-1 of BOD5, with hydraulic detention time (HRT) of 1.84 days in the gravel-filled HSSF-CWs (CWS-G) and 2.97 days in the PET-filled HSSF-CWs (CWs-P). The CWs-P were as efficient as the CWs-G in the removal of BOD5, COD, Total-P, and K-Total, being in some cases even more effective (turbidity,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wastewater; Elephant grass; Tifton 85 bermudagrass; Plants; Porosity.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162018000300417
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Injection of liquid swine slurry and effects on properties of a Nitossolo Vermelho PAB
Rech,Cleber; Albuquerque,Jackson Adriano; Corrêa,Juliano Corulli; Mafra,Alvaro Luiz; Bortolini,Diego.
Abstract: The objective of this work was to evaluate the superficial and injected applications of swine slurry and urea to the soil, regarding their effects on the physical properties of a Nitossolo Vermelho distroférrico under a no-tillage system. The treatments were: injected slurry into the groove with a liquid swine slurry injector (LSSI); slurry on surface, applied on the lines by the LSSI kept raised; urea injected by opening the groove with the LSSI and distributed manually; and corn, under no-tillage, as a control. Sowing and the injection of liquid slurry or urea do not modify the organic carbon content, pH, and aggregation, but alter the soil bulk density and porosity in the mobilized line, and increase the macropores.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Porosity; Soil structure; Urea.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000400518
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Microporosity of BIF hosted massive hematite ore, Iron Quadrangle, Brazil Anais da ABC (AABC)
VARAJÃO,CÉSAR A.C.; BRUAND,ARY; RAMANAIDOU,ERICK R.; GILKES,ROBERT J..
Massive hematite ore (MHO) is a special high-grade iron ore, used as lump ore in the process of obtaining direct reduction iron (DRI). The influence of porosity on the reducibility of MHO from the Capitão do Mato Mine (Iron Quadrangle, Brazil) was investigated using optical and scanning electron microscopes on drill core and open pit samples. Hematite is the main component of the samples and occurs as granular crystals (10 mum), microplates (1 mum) and euhedral martite (10 to 30 mum). Quartz, maghemite, kenomagnetite and goethite are minor components. Primary micropores (Å to 1 mum) are associated with microplaty crystals that fill cavities between granular hematite. Secondary micropores (Å to 5 mum) related to euhedral martite crystals, are the most...
Tipo: Info:eu-repo/semantics/article Palavras-chave: BIF; Porosity; Massive hematite ore; Direct reduction iron; Reducibility.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000100008
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Mineralogy of the clay fraction of alfisols in two slope curvatures: IV - spatial correlation with physical properties Rev. Bras. Ciênc. Solo
Camargo,Livia Arantes; Marques Júnior,José; Pereira,Gener Tadeu.
Although the influence of clay mineralogy on soil physical properties has been widely studied, spatial relationships between these features in Alfisols have rarely been examined. The purpose of this work was to relate the clay minerals and physical properties of an Alfisol of sandstone origin in two slope curvatures. The crystallographic properties such as mean crystallite size (MCS) and width at half height (WHH) of hematite, goethite, kaolinite and gibbsite; contents of hematite and goethite; aluminium substitution (AS) and specific surface area (SSA) of hematite and goethite; the goethite/(goethite+hematite) and kaolinite/(kaolinite+gibbsite) ratios; and the citrate/bicarbonate/dithionite extractable Fe (Fe d) were correlated with the soil physical...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aggregates; Mineral crystallinity; Density; Porosity; Penetration resistance; Cross-semivariogram.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200002
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Physical attributes of a chernosol on the west border of rio grande do sul cultivated with rice in two cultivation and irrigation systems. Repositório Alice
PINTO, M. A. B.; PARFITT, J. M. B.; NEMITZ, A. M. J.; SCIVITTARO, W. B.; WINKLER, A. S..
Tipo: Parte de livro Palavras-chave: Aggregation.; Density; Porosity; Soil management..
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/946234
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Physical attributes of kaolinitic and oxidic oxisols resulting from different usage systems BABT
Centurion,José Frederico; Beutler,Amauri Nelson; Souza,Zigomar Menezes de.
The objective of this study was to assess the physical attributes of a kaolinitic oxisol, medium texture (Haplustox) and an oxidic oxisol, clayey (Eutrustox) under different usage systems, localized in the region of Jaboticabal, SP, Brazil. The usage systems were sugarcane, cotton and forest. Parameters such as soil bulk density, total porosity, macro and microporosity at the depths of 0.0-0.1; 0.1-0.2; 0.2-0.3, and 0.3-0.4 m were evaluated. Haplustox showed greater bulk density and smaller total porosity, macro and microporosity. The usage increased the bulk density in 0.0-0.3 m depth, with greater effects on the kaolinitic oxisol, mainly in 0.1-0.2 m depth in the areas cultivated with sugarcane.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sugarcane; Cotton; Forest; Mineralogy; Porosity; Bulk density.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500007
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